Relocating IAT sensor?

[Mike]

this is where the spreadsheets on incoming are handy
try miscmath.xls from the incoming dir. also
http://www.bestintexas.com/cars/calculate/index.html

byE
Mike
Swayze
Mswayze at Truswood.com
Kswayze at Bellsouth.net
----- Original Message -----
From: "rr" <RRauscher at nni.com>
To: <gmecm at diy-efi.org>
Sent: Tuesday, October 24, 2000 9:40 PM
Subject: Re: Relocating IAT sensor?


>
> OK, I found some info. Didn't think I'd find it in this book, but it's
> there: Air is a mechanical mixture composed of 78 percent, by
> volume, of nitrogen, 21 percent of oxygen, and 1 percent of argon.
>
> Now the good stuff. . .
>
> At atmospheric pressure:
>
> Temp F:    Vol. of 1lb. in ft^3:      Density (lb/ft^3)
> 0                 11.57                           0.0864
> 32               12.39                           0.0807
> 72               13.39                           0.0747
> 102             14.14                           0.0707
>
> (Machinery's Handbook, 1976, p. 2306).
>
> Can anybody else do something with these numbers. How much
> of a change in fuel would be required?
>
> Thanks,
>
> BobR.
>
> Bruce Plecan wrote:
>
> > Why thank you!
> >
> > 02B0  for the 8D
> > 0247  for the 6E
> > are enable MAT temps for EGR.
> >
> > Funny how things only make sense one ya read them.
> > Bruce
> >    Still looking for more sense
> >
> > > I think the problem may be that we are confusing MAT with IAT. The 88h
> > mask
> > > for the '730 (v6), uses an IAT in the air cleaner. There are a bunch
of
> > tables
> > > that
> > > use it. I'm still deciphering the code, so I can't get real specific.
The
> > IAT is
> > > read
> > > 10 times a second.
> > >
> > > Ok, took a quick look at anht. Loop segment 10 reads the mat sensor 10
> > times
> > > a second. Saves the result in L013C & L0061 @ D74C. Looks like the egr
> > gets
> > > disabled when the MAT is less than 30c. Hmm, maybe thats what folks
are
> > > noticing when they relocate the sensor. . . (see D812).
> > >
> > > I guess what it comes down too, is how much does air density change
with
> > > temperature? That is what needs to be compensated for.
> > >
> > > BobR.
> > >
> > > Dave Zug wrote:
> > >
> > > > I'm glad this has come up again.. I never really got a responce
before
> > to
> > > > this:
> > > >
> > > > I have not seen where IAT affects ANAYTHING in the '727 / '730. I
see it
> > > > written to ONCE and never READ or used unless I'm missing an indexed
> > > > indirect bitwise X or something.
> > > >
> > > > ----- Original Message -----
> > > > From: <OneSS2NV at aol.com>
> > > > To: <gmecm at diy-efi.org>
> > > > Sent: Tuesday, October 24, 2000 7:10 AM
> > > > Subject: Relocating IAT sensor?
> > > >
> > > > > Hello all,
> > > > >    Since I'm going to have the top of the plenum off my TPI to
install
> > the
> > > > > adjustable fuel pressure regulator, would it be worth it for me to
> > > > relocate
> > > > > the IAT sensor and plug the port on the bottom with a pipe plug?
I
> > know
> > > > my
> > > > > IAT sensor is out in front on my Impala, and same thing with my
> > friend's
> > > > > Turbo Regal.  What effects, positive or negative, will it have?
> > > > >
> > > > >     Thanks in advance,
> > > > >        Steve Ragusa - AKA the "New Guy"
> > > > >         North Jersey
> > > > >       '85 Monte SS with '87 305 TPI MAF harness
> > > > >         '96 Impala SS
> > >
>
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